Two new germacrane sesquiterpenes(1) and (2) were isolated from Ligularia dentata. Their structures were elucidated by spectroscopic methods and 2D-NMR techniques.
A new guaiane sesquiterpene was isolated from Ligularia Nelumbifolia. Its structure was elucidated by spectroscopic methods including 2D-NMR techniques and showed to be 4 alpha ,9 alpha ,10 beta -tri-acetoxy-1 beta, 5...A new guaiane sesquiterpene was isolated from Ligularia Nelumbifolia. Its structure was elucidated by spectroscopic methods including 2D-NMR techniques and showed to be 4 alpha ,9 alpha ,10 beta -tri-acetoxy-1 beta, 5 alpha- guaia-6-ene (1).展开更多
U.V. irradiation of N-methylphenothiazine 1 in carbon tetrachloride produced 3-(phenothiazin-N-yl-carbonyl)-N-methylphenothiazine 2 together with the radical cation salt 1(+) CCl4- and methyl chloride, presumably via ...U.V. irradiation of N-methylphenothiazine 1 in carbon tetrachloride produced 3-(phenothiazin-N-yl-carbonyl)-N-methylphenothiazine 2 together with the radical cation salt 1(+) CCl4- and methyl chloride, presumably via a photoinduced electron transfer mechanism.展开更多
U.V. irradiation of N,N-dimethylaniline (DMA) in the presence of 7,7-dichloronorcarane (DCN) in acetonitrile solution produces N-methyianiline, 4,4'-methylenebis-(N,N-dimethylaniline), N-(4'-N',N'-dime...U.V. irradiation of N,N-dimethylaniline (DMA) in the presence of 7,7-dichloronorcarane (DCN) in acetonitrile solution produces N-methyianiline, 4,4'-methylenebis-(N,N-dimethylaniline), N-(4'-N',N'-dimethylaminobenzyl)-N-methylaniline and 7-chloronorcarane as the major products. A photoinduced electron transfer mechanism is proposed.展开更多
Two new taxane diterpenoids, 2-deacetoxy-7,9-dideacetyltaxinine J (1) and 2-deacetoxytaxinine B (3), were isolated from the barks of Taxus chinensis. Their structures were elucidated by spectroscopic methods.
文摘Two new germacrane sesquiterpenes(1) and (2) were isolated from Ligularia dentata. Their structures were elucidated by spectroscopic methods and 2D-NMR techniques.
文摘A new guaiane sesquiterpene was isolated from Ligularia Nelumbifolia. Its structure was elucidated by spectroscopic methods including 2D-NMR techniques and showed to be 4 alpha ,9 alpha ,10 beta -tri-acetoxy-1 beta, 5 alpha- guaia-6-ene (1).
文摘U.V. irradiation of N-methylphenothiazine 1 in carbon tetrachloride produced 3-(phenothiazin-N-yl-carbonyl)-N-methylphenothiazine 2 together with the radical cation salt 1(+) CCl4- and methyl chloride, presumably via a photoinduced electron transfer mechanism.
文摘U.V. irradiation of N,N-dimethylaniline (DMA) in the presence of 7,7-dichloronorcarane (DCN) in acetonitrile solution produces N-methyianiline, 4,4'-methylenebis-(N,N-dimethylaniline), N-(4'-N',N'-dimethylaminobenzyl)-N-methylaniline and 7-chloronorcarane as the major products. A photoinduced electron transfer mechanism is proposed.
文摘Two new taxane diterpenoids, 2-deacetoxy-7,9-dideacetyltaxinine J (1) and 2-deacetoxytaxinine B (3), were isolated from the barks of Taxus chinensis. Their structures were elucidated by spectroscopic methods.
